摘要
CO2驱既可以提高原油采收率又可以实现CO2气体的埋存,是目前国内外研究较多的驱油技术。对于CO2驱,一个重要工作就是根据油藏工程设计的井底压力通过井筒计算来优选井口注入参数,从而为注入井设计提供理论依据。目前CO2注入井筒温度、压力剖面计算主要将井筒中的CO2考虑为单一相态进行计算,因而计算结果精度较差。若将井筒中CO2的相态变化加以考虑,建立计算模型,对实例井进行计算。计算结果与实测结果对比显示模型计算精度较高。在此基础上,对注入温度、注入量等CO2井口注入参数进行了敏感性分析,结果表明,二者对CO2注入井井底温度、压力均有一定影响。
CO2 flooding,the most studied oil displacement technique home and broad,can increase crude oil recovery and pull off CO2 sealing.The key link for CO2 flooding is to provide theoretical backup for injection well designs by choosing the best well injection parameter according to shaft calculations based on the bottom-hole pressure designed by reservoir projects.The existing calculating methods of shaft temperature and pressure profile tend to consider CO2 in a single phase state which result in poor accuracy.If taking the phase change of CO2 into consideration,the calculation model achieves higher accuracy in measuring the tested well according to the comparison of calculated results and the measured results.A sensitivity analysis shows that the temperature and amount of CO2 injection both has affected the temperature and pressure of the bottom of the injection well.
出处
《江汉石油职工大学学报》
2012年第4期22-24,共3页
Journal of Jianghan Petroleum University of Staff and Workers
关键词
二氧化碳驱
井筒流动
温度
压力
注气
CO2 Flooding
Shaft Flow
Temperature
Pressure
Gas Injection
